Hi Kary,I tried installing cuda 4.0 on ubuntu 10.10 but faced error nvidia-installer must be run as root

Steps.1. Sudo telinit 3 2. Login3. cd Downloads4. chmod u+x devdriver_4.0_linux_64_270.41.19.run5. ./devdriver_4.0_linux_64_270.41.19.runerror appears nvidia-installer must be run as root.Could you help me with this